NOTE
If the fre quency is greater than the max i mum fre quency
in the ta ble, the off set value from the max i mum ta ble fre -
quency is used. If the fre quency is less than the min i mum
fre quency in the ta ble, the off set from the min i mum ta ble
fre quency is used. The fre quency com par i sons start from
the be gin ning of the ta ble; if the en try is 0 Hz, this is
counted as the end of the ta ble.
Query: OFFTBL? <s>
Re turned
String: OFFTBL <s>,<val>
OFFTBR Out put an off set ta ble
SEN SOR
Syn tax: OFFTBR <val>
val: 1 to 5
Re marks: Out puts the se lected off set ta ble. The re turned string is con structed as
fol lows:
OFFTBR #<length><number_of_bytes>,<ele ment1<ele ment2><ele -
mentn>
Where <length> is the char ac ter size of the <number_of_bytes> field
and
<number_of_bytes> is the number of bytes which make up the string
af ter the comma (,). For ex am ple:
OFFTBR #41600,<data...>
4 = number of char ac ter to read next for the data length
1600 = One thou sand and six hun dred bytes of data to read in, rep re -
sent ing 200 ele ments placed one af ter the other with out com mas. Each
<ele ment> is made up of 8 bytes; the first four bytes are the Fre quency
and the sec ond four bytes are the cor re spond ing dB value for the Fre -
quency. For ex am ple:
<data_ele ment1><data_ele ment2><data_ele ment3> is equal to:
<freq1><dB1><freq2><dB2><freq3><dB3>... is equal to:
<4bytes1><4bytes1><4bytes2><4bytes2><4bytes3><4bytes3>
The four byte bi nary data can be con verted back to a float ing point num -
ber by di vid ing the four byte LONG num ber by 1024. For ex am ple:
FFFFD711 be comes –10479, then di vided be come –10.234. The C pro -
gram ming ex am ple 'Bi nary out put de cod ing' on page 6-136 shows how to
ex tract the bi nary data.
OFFTBU Up dates an off set ta ble
SEN SOR
Syn tax: OFFTBU <val>,<bytes>,<bi nary_data...>
ML2400A OM 6-63
GPIB OPERATION ML24XXA NATIVE COMMANDS
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